CGImageAlphaInfo.none There is no alpha channel. Declarationcase none See AlsoConstantsCGImageAlphaInfo.firstCGImageAlphaInfo.lastCGImageAlphaInfo.noneSkipFirstCGImageAlphaInfo.alphaOnlyCGImageAlphaInfo.noneSkipLastCGImageAlphaInfo.premultipliedFirstCGImageAlphaInfo.premultipliedLast